HEREDITY
BASICS OF PROBABILITY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Rolling a 15 on a number cube or a die
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impossible
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equally likely
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certain
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likely
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Explanation:
Detailed explanation-1: -In other words, the probability P equals p to the power n, or P = pⁿ = (1/s)ⁿ . If we consider three 20-sided dice, the chance of rolling 15 on each of them is: P = (1/20)³ = 0.000125 (or P = 1.25.
Detailed explanation-2: -Then, find the ratio of favorable outcomes to total outcomes. The answer is 1:3. The theoretical probability of rolling a 2 or a 3 on a number cube is 1:3.
Detailed explanation-3: -If by a “standard number cube” you mean an unbiased six-sided die with the sides numbered 1-6, the probability of rolling one of them is 2/6 or 1/3.
There is 1 question to complete.